special senses - hearing Flashcards
• hearing
• equilibrium
two senses housed in the ear
pressure disturbance produced by a vibrating object
sound
number of waves pass a given point in a given time
frequency
amplitude, or height, of the wave reveals _____
a sounds loudness
collects sound
pinna
channels sound inward
external auditory canal
opening from the auditory canal is covered by the _____
tympanic membrane
auditory tube connecting the middle ear with the throat
eustachian tube
• this tube allows for equalizing pressure between the middle ear and the external environment during activities like yawning or swallowing.
• The tube is normally collapsed, but it opens during these actions to allow air to flow into the middle ear, balancing pressure and preventing discomfort.
eustachian tube
• malleus (hammer)
• incus (anvil)
• stapes (stirrup)
3 bones span the cavity, vibrations from eardrum move the malleus, these bones transfer and amplify sound to the inner ear
twisted bony tubes within temporal lobe
labyrinth/inner ear
• vestibule (balance)
• cochlea (hearing)
• semicircular canals (balance/spacial orientation)
sense organs for hearing and balance
perilymph (extra cellular fluid)
what the inner ear is filled with
channels new vibrations trough perilymph; transfers to organ of corti
cochlea
contains strreocilua (hair like cells) that move due to the waves in the perilymph
organ of corti
transmits nerve impulses to auditory correct on temporal lobe
cochlear nerve attached to hair cells
in the vestibule
static equilibrium
in the semicircular canals
dynamic equilibrium
sensory receptors for static equilibrium
maculae
